Elevator



Feb. 19, 1929. 1,702,349

I G. KRELL ELEVATOR Filed Dec. 23, 1926 3 Sheets-Sheet 1 ATTORNEY Patented Feb. 19, 1929.

PATENT OFFICE.

GEORGE KRELL, F SAPlULPA, UKLAHOMA.

ELEVATOB.

Application led December 23, 1926. Serial No. 156,579.

lirregularities due to improper rolling, rust,

corrosion, or accident.

The invention has as a further object the production of a structure having jaws, each of which has several gripping element-S for engagement with the pipe at several differi ent points throughout the'circumference of the pipe and are movable relatively to each other to compensate for irregular-ities in the circumference of the pipe and thereby accommodate and securely grip the pipe.

lt is another object of the invention to construct the jaws so that the gripping elements may be received by the jaws and be disposed therein and with relation to each other to properly embrace the pipe and apply the force of the gripping elements to the pipe at several points of the circumference of the pipe and thereby result in the application of the proper holding action of the gripping element upon the pipe.

It is a further object of the invention to associate with the jaws a mechanism for actuating the jaws to cause the jaws to grasp and release the pipe.

The invention has other objects, all of which will be more readily understood when read in conjunction with the accompanying drawings which show one embodiment of which the invention is susceptible, it being obvious, however7 that changes and moditications may be resorted to without departing from the spirit of the appended claims forming a part hereof.

In the drawings:

Fig. 1 is a perspective view of the device showing' its application for use and in engagement with the pipe.

Fig. 2 is a perspective view of the device partly broken away for better illustration of the operating mechanism.

Fig. 3 is a section taken on the line 3-3 of Fig. 4.

Fig. 4 is a section on line 4-4 of Fig. 3.

Fig. 5 is a detail perspective view of one of the holding jaws employed in the structure.

Fig. 6 is a detail perspective view of one of the gripping elements which is associated with the jaw shown in Fig. 5.

Fig. 7 is a detail perspective view of one of the operating arms for actuating the jaws.

Fig. 8 is a detail perspective view of one of the side bar members `employed in the construction.

Referring more in detail to the drawings:

l designates the platform of a derrick and a casing spider which is positioned over the mouth of an oil or other well and is adapted to receive casing or tubing for lowering or lifting movement therethrough-or to engage the same and hold it suspended within the well while its engagement with an elevator is being effected.

The elevator generally designated 2 consists of a plurality of elements which are connected together so as to form a substantially rectangular frame for supporting the movable jaws 3 and 4 and to which lifting hails 5 are connectedfor association with a tackle (i. The rectangular frame 2 includes the parallel side bars 7 and 7 which have their opposite ends respectively connected to shafts 8 and 8 and thus forms a frame by and within which thejaws 8 and 4 are mounted. The ends of the bails 5 are pivotally secured to the shafts 8 and 8 and are held in spaced relation to each other by means of the spacers 9 and 10 arranged upon the shafts. The ja-ws 3 and 4 are held in asso ciated relation with the frame of the elevator by means of the arms 11, 12, 13 and 14 each having one end adjustably fixed on a shaft 8 or 8 by a pin or set screw 11', 12.', 13 or 14 and having their opposite ends in pivotal connection with the jaws 3 and 4 so that when the arms at one side of the structure are rocked` as hereinafter described, the jaws are moved as a unit and any looseness due to play of the arms on the shafts is obviated.

Rollers 15-15 are mounted upon the ends of the shafts 8 and 8 and provide casters whereby the entire device may be conveniently transported from one location to another.

A means is provided for actuating the jaws so as to releasably engage the pipe. This means is generally designated 16 (Fig. 1) and includes a lever 17 which is pivotally connected at 18 to one of the side bars, such as 7', which side bar has a portion 19 providing means with which a detent 20 of the lever fro-operates to hold the lever mechanism and the jaws in operative or inoperative condition.

The lever 17 has an extension 2l which, through the medium of a linlr 22 is connected to the pivoted arm 3, which is pivotally connected at 2st to one ot' the side arms, such as 7. A connection is formed through the me? dium oi" the linlrs 9.5 and 26 with the arm 23 and said links have their opposite ends respectively attached to each oit the aws at the connection oit the arms l?) and ll with the jaws trom which it is evident that upon actuation of the lever l?, the jaws 3 and al will be moved to cause their engagement with or release ifrom a pipe located between the jaws, the linlt connection ei'llecting a compound leverage making it possible to easily open or close the heavy jaws with a minimum oi eiiort applied through the lever li'.

lThe jaws 23 and Ll are connected together by means oi' the horizontally arranged parallel tie rods 27 and 2S, which are slidably mounted in the apertured lugs Q9 and l0 respectively provided upon each oit the jaws and 4 and upon opposite sides thereof so as to receive the rods and retain the jaws in proper vertical alignment with each other when actuated to open and close upon a pipe.

Each el the aws 3 and l is designed to accommodate several gripping elements designated 3l, which are disposed relatively to each other so that one oit the gripping elements is interposed between others thereol carried by each of the jaws so that the pipe will be engaged at several dii'erent points of its circumference when the jaws are closed to grip tl c pipe.

These gripping elements ll-3l are arranged in recesses 32 provided in the inner faces of the jaws 3 and a and are pivotally mounted in said recesses by means oi the pivots 33 which are passed through apertures 33 in the flanges Bfr-*Sel into an aperture 31 in a gripping member forming the upper and lower walls oll said recess 32 in which the gripping elements are located, the recess being of substantially greater diameter than the pivot members to permit play of the members and thereby ailord flexibility ot movement oi2 the gripping member to permit their automatic adjustment to the carrier.

@ne tace ot the gripping elements 3l is provided with serrations 35, which are de signed to grip the pipe and hold it against slippage with relation to the jaws and each gripping element has its opposite tace formed so that the gripping elements may move on their pivots within the recessed portions oi' the jaws.

By reference particularly to Fig. 4i it will be noted that the gripping elements are disposed as hereinbeitore referred to and that one ot the several gripping elements of one of the jaws is arranged diainetrically opposite a similar gripping element olf the other jaw. This relative arrangement of the sevmeas/ie eral gripping elements insures engagement ot' the gripping elements with pipe at several diii'erent points oi'f the circumference ot the pipe to eii'ectively grip the pipe and hold it, even though the circumference of the pipe is `of an irregular character or has a surface which is out ot' round, due to improper rolling, rust, corrosion or accident.

The flanges 3at-3-i ot the jaws d and l have their outer edges, such as S6 and 3l, beveled so as to facilitate the association ot 'the jaws with the pipe.

From the foregoing description it is inanitest that a supporting trame is provided within which the clamping aws are mounted tor movement toward and away trom each other and relative to a pipe to eli'ectholding and release ott the pipe. lt is further evident that each jaw is provided with several gripping elements which are pivotallj7 n'iounted and disposed relatively to each other so that the pipe will be engaged by the gripping elements at several diilerent opposed points throughout the circumference ot' the pipe which thus will result in producing the proper holding or gripping action upon the pipe, even though the pipe is more or less irregular in outline.

llhat l claim and desire to secure by Letters JPatent is:

l. ln a casing elevator the combii'iation olf jaws, a trame for supporting said jaws, a lever mechanism for actuating said jaws, said lever mechanism including a lever and a pivoted arm, a link connectin, 1 the pivoted arm and lever and linlts respectively connected with the jaws and with said pivoted arm.

2. A device of the character described including a frame, jaws on said trame, lever and arm members pivoted on said iframe, a link connecting the lever and arm members, and links connected with said arm member coanially with the linl connection and attached to said jaws.

3. A device of the character described including a :tramel arms pivotally mounted in the traine, jaws pivotally mounted on said arms, a lever on said trame, an a rm pivotally mounted on said trame, a link pivotally connected with said arm and with said lever7 and linlzs connected with `said jaws and with said arm operable b v said lever to open the jaws.

4.-. il device oit the character described including a l'rame, paired jaws pivotally mounted on the frame, lever and arm members pivotally mounted on lthe frame, linlts pivotally connected with said jaws, a pivot member connecting both oit said linlts with said arm, and a link on said pivot member connected with said lever.

ln testimony whereof l ai'lix mv signature.

suenen "neutri lll() lill 

